2021110212121 has 32 divisors (see below), whose sum is σ = 2730943127808. Its totient is φ = 1444485968640.

The previous prime is 2021110212067. The next prime is 2021110212131. The reversal of 2021110212121 is 1212120111202.

It is not a de Polignac number, because 2021110212121 - 2¹³ = 2021110203929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021110212095 and 2021110212104.

It is not an unprimeable number, because it can be changed into a prime (2021110212131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6273070 + ... + 6587383.

It is an arithmetic number, because the mean of its divisors is an integer number (85341972744).

Almost surely, 2^{2021110212121} is an apocalyptic number.

It is an amenable number.

2021110212121 is a deficient number, since it is larger than the sum of its proper divisors (709832915687).

2021110212121 is a wasteful number, since it uses less digits than its factorization.

2021110212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12860641.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2021110212121 its reverse (1212120111202), we get a palindrome (3233230323323).

The spelling of 2021110212121 in words is "two trillion, twenty-one billion, one hundred ten million, two hundred twelve thousand, one hundred twenty-one".